208705057869 has 32 divisors (see below), whose sum is σ = 349805583360. Its totient is φ = 108418197360.

The previous prime is 208705057861. The next prime is 208705057879. The reversal of 208705057869 is 968750507802.

It is a happy number.

208705057869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 208705057869 - 2³ = 208705057861 is a prime.

It is a super-2 number, since 2×208705057869² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208705057861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3705459 + ... + 3761360.

It is an arithmetic number, because the mean of its divisors is an integer number (10931424480).

Almost surely, 2^208705057869 is an apocalyptic number.

It is an amenable number.

208705057869 is a deficient number, since it is larger than the sum of its proper divisors (141100525491).

208705057869 is an equidigital number, since it uses as much as digits as its factorization.

208705057869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7466862 (or 7466840 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 57.

The spelling of 208705057869 in words is "two hundred eight billion, seven hundred five million, fifty-seven thousand, eight hundred sixty-nine".